{"instruction": "You are an expert in named entity recognition. Please extract entities that match the schema definition from the input. Return an empty list if the entity type does not exist. Please respond in the format of a JSON string.", "schema": ["Disease", "Chemical"], "input": "In order to clarify whether the same is true for migraine with aura , in the present study we examined the headache response to intravenous infusion of glyceryl trinitrate ( GTN ) ( 0 . 5 microg / kg / min for 20 min ) in 12 sufferers of migraine with aura ."}
{"Disease": ["migraine with aura", "headache"], "Chemical": ["glyceryl trinitrate", "GTN"]}